List the four natural agents of erosion.

Water, wind, glacier, and gravity.

State one indirect energy source that fuels erosion.

The sun; energy from which drives the Earth's water cycle.

Discuss mass movement.

Erosion when sediments are transported down hill by gravity. An avalanche is an example.

Explain how water is a catalyst for mass movement.

Water liquifies the loose soil and reduces friction to almost zero. Then, gravity can do its work and cause slump or a mud flow.

Describe a tributary.

A smaller stream that flows into a larger river.

Name four ways that running water can transport sediment.

Floatation, suspension, solution, and traction.

The area of land drained by a river system. The Mississippi enjoys the largest geographic watershed in America.

Describe how gradient and discharge determine stream flow velocity.

Gradient is the slope of the landscape. Discharge is the volume of water transported. Greater slope and discharge means faster velocity.

How does water flow velocity effect the size of sediment that may be transported?

See ESRT pg. 6. Faster flow, larger particles/sediments may be eroded. Direct relationship.

Where in a straight stream section does water flow the fastest?

Where the friction is least; center, center.

Where does water flow fastest in a bend?

On the outside of a curve where erosion is the dominant action.

Where does water flow slowest in a bend?

On the inside of a curve where deposition is the dominant action.

Depict a young stream.

Steep gradient, narrow banks, deep channel, straight path, fast water velocity eroding large sediments.

Depict an old stream.

Gentle gradient, wide banks, a mature flood plain, slow moving water carrying smaller sediments, in an S shaped configuration.

A lazy S shaped river which is old and mature.

A triangular deposition pattern at the mouth of a river.

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Topic 9: Erosion

Pages (186-190).

Question	Answer
Define erosion:	Sediment transport.
List the four natural agents of erosion.	Water, wind, glacier, and gravity.
Name the force responsible for erosion on Earth.	Gravity.
State one indirect energy source that fuels erosion.	The sun; energy from which drives the Earth's water cycle.
Discuss mass movement.	Erosion when sediments are transported down hill by gravity. An avalanche is an example.
Explain how water is a catalyst for mass movement.	Water liquifies the loose soil and reduces friction to almost zero. Then, gravity can do its work and cause slump or a mud flow.
State the predominate agent of erosion on Earth today.	Running water.
Define a stream.	Run off confined to a channel.
Describe a tributary.	A smaller stream that flows into a larger river.
Name four ways that running water can transport sediment.	Floatation, suspension, solution, and traction.
Describe the shape of a valley created through running water.	V - shaped.
Define a watershed.	The area of land drained by a river system. The Mississippi enjoys the largest geographic watershed in America.
Describe how gradient and discharge determine stream flow velocity.	Gradient is the slope of the landscape. Discharge is the volume of water transported. Greater slope and discharge means faster velocity.
How does water flow velocity effect the size of sediment that may be transported?	See ESRT pg. 6. Faster flow, larger particles/sediments may be eroded. Direct relationship.
Where in a straight stream section does water flow the fastest?	Where the friction is least; center, center.
Where does water flow fastest in a bend?	On the outside of a curve where erosion is the dominant action.
Where does water flow slowest in a bend?	On the inside of a curve where deposition is the dominant action.
Depict a young stream.	Steep gradient, narrow banks, deep channel, straight path, fast water velocity eroding large sediments.
Depict an old stream.	Gentle gradient, wide banks, a mature flood plain, slow moving water carrying smaller sediments, in an S shaped configuration.
Define meander:	A lazy S shaped river which is old and mature.
Describe a delta.	A triangular deposition pattern at the mouth of a river.

Created by: whearn

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